Automatic fire-alarm indicator



Sept. 1, 1925. 1,552,105

7 F. J. ZEPERSKI AUTOMATIC FIRE ALARM INDICATOR Filed June 30, 1924 an undo;

Patented Sept. 1, 1925.

UNITED STATEfi FRANK J. ZEPERSKI, OF MEMPHIS, TENNESSEE.

AUTOMATIC FIRE-ALARM INDICATOR.

Application filed. June 30, 1924.

To all whom it may concern:

Be it known that I, FRANK J. Znrnnsnr, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented certain new and useful Improvements in Automatic F ire-Alarm Indicators, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in automatic fire alarm indicators, the object being to provide a device whichwhen arranged within an elec tric circuit will indicate on sounding an alarm, the exact location of the fire.

Another object of my invention is to provide a device in which a circuit closure is employed which is exceedingly simple and cheap in construction, the movable contact being normally held out of engagement with the fixed contact by a fusible disc which is adapted to melt at a predetermined degree of temperature so as to allow the circuit to be closed in order to sound the alarm.

A still further object of the invention is to provide a circuit closure in which the movable contact is moved into engagement with the fixed contact by a spring so that when the fusible disc melts, the movable contact will be instantaneously moved against the fixed contact so as to complete the electric circuit in order to sound the alarm instantaneously.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined in the appended claims.

In the drawings,

Figure 1 is a side elevation of the device;

Figure 2 is a vertical section;

Figure 3 is a side elevation partly broken away to show the movable contact in engagement with the fixed contact; and

Figure 1 is a section taken on line 41- 1 of Figure 1.

In carrying out my invention I employ a tubular casing 1 of non-conducting material, in the ends of which are arranged conical plugs 2 and 3 provided with threaded stems 4L and 5 on which are mounted binding nuts 6 and 7.

Arranged over the plugs 2 and 3 are conical heads 8 and 9 conforming to the shape of the plugs 2 and 3 and over which the ends of the casing 1 are adapted to be clamped as clearly shown. in Figure Serial' No. 723,276.

The conical heads are provided with threaded necks working on the stems 4 and 5 of the plugs so that by screwing the heads down over the plugs, the end portions of the tubular casing will be clamped securely over the plugs.

ires 10 and 11 of an electric circuit are adapted to be clamped by the binding nuts 6 and 7 against the heads 8 and 9 and the wires 10 and 11 are arranged in electric circuit to which is connected an indicator for sounding an alarm when the circuit is completed as will be later described.

Secured to the plug 2 within the casing 1 is a spring contact 12 on which is adapted to be disposed an insulating apertured disc 13, over the aperture of which is arranged a fusible disc 14: against which is adapted to bear a pin 15 forming the movable contact of the circuit closure, said pin being carried by a coil spring 16, one end of which is secured to th plug 3 and the other end extends through a transverse opening formed in the pin as clearly shown in Figure 2.

When the circuit closure as above clescribed is arranged in electric circuit in which is mounted an indicator, the circuit is open and when a fire occurs, the fusible disc 1 1- melts and allows the pin 15 to pass through the aperture of the non-conducting disc 13 between the arms and the spring contact 12 so as to complet the circuit and sound the alarm so that a watchman or anyone will be notified that there is a fire and if the alarm is connected to an indicator, the exact location of the fire can be ascertained.

From the foregoing description it will be seen that I have provided an automatic fire alarm indicator in which a movable and a fixed contact are employed, the movable contact being spaced from the fixed contact by a non-conducting disc and a fusible disc so that when the fusible disc melts, the movable contact will be forced into engagement with the fixed contact by a spring so as to complete the electric circuit and sound the alarm.

What I claim is 1. In an automatic fire alarm indicator, the combination with an electric circuit of a circuit closure arranged within said cir cuit comprising a tubular casing of nonconducting material having conical plugs arranged within its ends, conical heads arranged over said plugs for clamping the threaded necks mounted on said stems tor clamping the ends of said casing over said plugs, a spring contact carried by one of said plugs, a spring carried by the other plug, a pin carriedby said spring, a nonconducting disc arranged against said spring contact and a fusible disc disposed against said non-conducting disc adapted to be engaged by said pin.

In testimony whereof I hereunto aflix in signature.

FRANK J. ZEPERSKI. 

